Lua APA (7ú heag.)
ebrary, Inc, Whitley, B. L., & Thornton, S. H. (2012). Tryptophan: Dietary sources, functions and health benefits. Nova Science Publishers.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, Blake L. Whitley, agus Sarah H. Thornton. Tryptophan: Dietary Sources, Functions and Health Benefits. Hauppauge, N.Y.: Nova Science Publishers, 2012.
Lua MLA (9ú heag.)
ebrary, Inc, et al. Tryptophan: Dietary Sources, Functions and Health Benefits. Nova Science Publishers, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.